Title :
A physics-based fast approach to scatter correction for large cone angle computed tomographic systems
Author :
Zou, Yu ; Silver, Michael D. ; Chiang, Be-Shan ; Oishi, Satoru ; Uebayashi, I. Yoshinori ; Noshi, Yasuhiro ; Nakanishi, Satoru
Author_Institution :
Toshiba Med. Res. Inst. USA, Vernon Hills, IL, USA
Abstract :
An efficient scatter correction model is developed for large cone angle CT systems. The scatter intensities are expressed as a 2D convolution of forward functions with two Gaussian kernels. The kernels are derived from the differential cross sections of the Rayleigh (coherent) and Compton (incoherent) scattering. The results of water phantoms show good CT number uniformity and accuracy. The clinical images demonstrate a significant improvement on image quality.
Keywords :
Compton effect; Rayleigh scattering; X-ray scattering; computerised tomography; medical signal processing; 2D forward function convolution; Compton scattering; Gaussian kernels; Rayleigh scattering; computed tomographic systems; fast approach scatter correction; image quality; incoherent scattering; large cone angle CT systems; physics based scatter correction; scatter correction model; scatter intensity;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE
Conference_Location :
Valencia
Print_ISBN :
978-1-4673-0118-3
DOI :
10.1109/NSSMIC.2011.6153704
